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3 years ago

PLEASE HELP ASAP 15 POINTS

Mathematics

1 answer:

kaheart [24]3 years ago

4 0

1/2(4x-5) + 5/2 = 10

Use the distributive property:

2x - 5/2 + 5/2 = 10

Use addition property:

2x = 10

Divide both sides by 2:

x = 10/2

x = 5

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A rectangle has a perimeter of 48 ft. The length and width are scaled by a factor 1.5.

prohojiy [21]

Answer: 75

Step-by-step explanation:

when increased in scale,

both sides are multiplied by the factor which is 1.5.

72 =1.5(2L+2W)

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3 years ago

Resistors are labeled 100 Ω. In fact, the actual resistances are uniformly distributed on the interval (95, 103). Find the mean

Zinaida [17]

Answer:

$E[R]$ = 99 Ω

$\sigma_R$ = 2.3094 Ω

P(98<R<102) = 0.5696

Step-by-step explanation:

The mean resistance is the average of edge values of interval.

Hence,

The mean resistance, $E[R] = \frac{a+b}{2} = \frac{95+103}{2} = \frac{198}{2}$ = 99 Ω

To find the standard deviation of resistance, we need to find variance first.

$V(R) = \frac{(b-a)^2}{12} =\frac{(103-95)^2}{12} = 5.333$

Hence,

The standard deviation of resistance, $\sigma_R = \sqrt{V(R)} = \sqrt5.333$ = 2.3094 Ω

To calculate the probability that resistance is between 98 Ω and 102 Ω, we need to find Normal Distributions.

$z_1 = \frac{102-99}{2.3094} = 1.299$

$z_2 = \frac{98-99}{2.3094} = -0.433$

From the Z-table, P(98<R<102) = 0.9032 - 0.3336 = 0.5696

5 0

3 years ago

20(square of 2) + 6(9 + 3) <br> ANSWER: 472

Rainbow [258]

What’s the question your asking here ?

4 0

2 years ago

Read 2 more answers

Please this is overdue

andre [41]

P=12

A=15

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2 years ago

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marusya05 [52]

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3 years ago